摘要
为了破解裂缝地层识别与评价的难题,进行缩比例模型井声波测量物理实验,结合数值模拟分析不同裂缝宽度和条数下斯通利波特征,总结水平裂缝不同宽度及条数对斯通利波衰减的影响规律,提出裂缝等效宽度的概念,定量表征裂缝带对斯通利波幅度的影响,建立基于裂缝等效宽度的反演方法和流程。研究结果表明:随着裂缝等效宽度的增大,直达斯通利波幅度呈指数规律减小;在裂缝等效宽度保持不变的情况下,裂缝条数越多,直达斯通利波幅度越大;利用裂缝等效宽度能够实现裂缝带的定量表征。
The physical experiment of acoustic wave measurement was carried out in a scaled model well in order to identify and evaluate fracture formation.The characteristics of Stoneley waves under different width and number of horizontal fractures were analyzed through numerical simulation,and the influences of the width and number of horizontal fractures on the attenuation of Stoneley waves was summarized.On this basis,the concept of equivalent fracture width was proposed for the first time,the impact of fracture zones on Stoneley wave amplitude was quantitatively characterized,and an inversion method and process based on equivalent fracture width were established.The research results show that as the equivalent fracture width increases,the amplitude of the direct Stoneley wave decreases exponentially.Under the same equivalent fracture width,the more the number of fractures,the greater the amplitude of the direct Stoneley wave.The equivalent fracture width can be used to quantitatively characterize the fracture zone.
作者
齐戈为
唐军
蔡明
何泽
郑辰昌
秦迎春
QI Gewei;TANG Jun;CAI Ming;HE Ze;ZHENG Chenchang;QIN Yingchun(College of Geophysics and Petroleum Resources,Yangtze University,Wuhan,Hubei 430100,China;Jiabaili Energy Technology(Tianjin)Co.,Ltd.,Tianjin 300453,China)
出处
《西安石油大学学报（自然科学版）》
CAS
北大核心
2024年第2期31-38,共8页
Journal of Xi’an Shiyou University（Natural Science Edition）
基金
国家自然科学基金“致密储层裂缝有效性的双尺度声波测井评价方法研究”(42104126)。
关键词
声波测井
斯通利波
裂缝等效宽度
裂缝条数
acoustic logging
Stoneley wave
equivalent fracture width
number of fractures
